M4.3 earthquake 138 km SSE of Hihifo, Tonga
A magnitude 4.3 earthquake struck 138 km SSE of Hihifo, Tonga on Mon, Dec 10, 1984, 7:09 AM GMT-11 (18:09 UTC), 165 km (103 mi) below the surface.
A larger quake followed: M4.9 77 km SSW of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 1984-12-10 18:09:50 UTC
- Depth
- 165.4 km (102.8 mi), intermediate-depth
- Epicenter
- 17.110° S, 173.307° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.977 km SSW of Hihifo, Tonga · 15243 days ago · 143 km deep · 88 km away
- 4.0126 km SSE of Hihifo, Tonga · 15236 days ago · 140 km deep · 14 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00029xp. Read Tue, Sep 29, 2026, 12:43 PM UTC.